Need an Arduino Tone Digital Volume Control Method

CrossRoads:
I am toying with the idea of making a 10" x 10" board of footprints for $95 here, cutting them up hacksaw and adding square posts for breadboard use as I go.
https://www.internationalcircuits.com/layer_grid.php?cat_id=13

Looks like someone already has had a similar idea and is selling it on ebay.
http://cgi.ebay.com/SMD-CONVERTER-ADAPTER-PCB-SOT-MSOP-SIP-DIP-14-/120628243230?pt=LH_DefaultDomain_0&hash=item1c1600eb1e#ht_2710wt_905